Both black and brown roughnecks are known for their very calm temperament, rarely biting or tail whipping in captivity. Commonly found in roofs of houses. It …
The black-headed monitor or mournful monitor (Varanus tristis) is a relatively small species of monitor lizards native to Australia. BLACK-HEADED MONITOR Scientific name: Varanus tristis Family: Varanidae Order: Squamata Status: Least Concern. Habitat and Distribution. Life cycle. It is occasionally also called the freckled monitor or the racehorse monitor, a name it shares with the Gould's monitor due to their exceptional speed. The black tree monitor or Beccari's monitor (Varanus beccarii) is a species of lizard in the family Varanidae.The species is a relatively small member of the family, growing to about 90–120 cm (35–47 in) in total length (including tail). Freckled monitor (Varanus tristis) sometimes called red-headed or black headed monitors. V. beccarii is endemic to the Aru Islands off New Guinea, living in an arboreal habitat. Photographs, distribution map and other information on Black-headed monitor (Varanus tristis) at the Australian Reptile Online Database Moderately common in the jarrah forest and granite outcrops in the Darling Range.
The known lifespan of black roughneck monitor is about 12–20 years. When threatened they prefer to escape, urinate or defecate, puff up their throats or “go necrotic” by closing their eyes as if playing dead. Black-headed Monitor (Varanus tristis): Charles Darwin, Carnarvon, Yourka, Naree Lace Monitor or Tree Goanna (Varanus varius): Brogo, Reedy Creek, Fan Palm, Nardoo Hills, Carnarvon, Yourka Pygmy Mulga Monitor (Varanus gilleni): Cravens Peak, Ethabuka, Bon Bon Perentie (Varanus giganteus): Cravens Peak, Ethabuka, Charles Darwin, Birriliburu, Hamelin